<template>
<h3>Item</h3>
</template>

<!-- 加scoped 不然样式会在全局都生效-->
<style scoped>
h3{
  width: 80%;
  margin: 0 auto;
  text-align: center;
  line-height: 100px;
  box-sizing: border-box;
margin-top: 50px;
background: #999;
}
</style>
